I am new to rifles having only dealt with pistols and shotguns in my life. I just finished the lower on my AR project. Next, I ordered a stripped M4 upper because it was a very good deal and I want to build the entire rifle myself.

My only problem is I don't know what goes into the upper. Is it anything more than the forward assist assembly, bolt carrier group, charging handle and the ejection port cover assembly?

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Krav Maga/Judo
Qualified Rifleman/Marksmanship Instructor/Lic. Medic
"There is therefore now no condemnation to those who are in Christ Jesus, who do not walk according to the flesh, but according to the Spirit" Romans 8:1

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